Design of steel structures video lectures, civil engineering video lectures, design of steel structures video tutorials, design of steel structures by duggal, design of steel structures by ramachandra,design of. Friction stir welding is a solidstate process, which means that the objects are joined without reaching melting point. Those who are interested to know more about welding engineering and the way it functions can learn about the same with our tutorials. The welding is carried out, so you have number of welding robots which are. Learn for free, pay a small fee for exam and get a certificate. Steel making nptel online videos, courses iit video. A relatively small depth of material will become molten, and upon cooling, the structural steel and weld metal will act as one continuous part where they are joined.
For successful application of welding to produced sound weld joints, it is utmost important to understand the science and technology behind the welding. Download free sample and get upto 79% off on mrprental. This presentation will outline various defects associated with welding processes and possible remedial measures to avoid the welding defects. Ultrasonic welding is an industrial technique whereby high frequency ultrasonic acoustic vibrations are locally applied to work pieces being held together under pressure to create a solid state weld. Our online video tutorials are going to explore and explain the different concepts that are a part of mechanical sciences. When two parts to be joined are melted together, heat or pressure or both is applied and with or without added metal for formation of metallic bond. Usually fusion welding uses a filler material to ensure that the joint is filled.
Buy a textbook of welding technology ebook by o p khanna pdf online from dhanpat rai publications. This flame directly strikes the weld area and melts the weld surface and filler material. It is particularly valuable for the economical production of complex shapes, ranging from massproduced parts. Free guide how to do mig welding free guide on how to do mig welding using a mig welder metal inert gas. Arc welding by ryan saucier history of arc welding arc welding dates back to the late 1800 s first developed following the invention of ac electricity pioneered. Asm offers a variety of learning options that will suit your schedule and budget. Civil engineering video lectures nptel video lectures. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Welding is the process of coalescing materials such as metals or thermoplastics in order to seamlessly join them. Rightward and all position rightward welding rightward welding is recommended for steel plate over 5. Gas welding and cutting oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. Gas welding oxy acetylene welding oxy hydrogen welding.
Using fsw, rapid and high quality welds of 2xxx and 7xxx series alloys, traditionally considered unweldable, are now. Most of these courses consists 40 videos and 1 hour duration each. Gas metal arc welding gmaw, by definition, is an arc welding process which produces the coalescence of metals by heating them with an arc between a continuously fed filler metal electrode and the work. Download a textbook of welding technology ebook by o p khanna. The essential feature of the process is the small diameter electrode wire, which is fed continuously into the arc from a coil. Dwivedi,department of mechanical engineering,iit roorkee. Manufacturing processes i nptel online videos, courses. Ppt arc welding powerpoint presentation free to download. Welding is the process of joining together two pieces of metal so that bonding takes place at their original boundary surfaces.
The course focuses on understanding the metallurgy and solidification of weldments the course will make the students aware with the metallurgical aspects of welding. Mod2 lec4 welding nptel design of steel structures. And i am using like say an assembly robots or you can say welding robots to carry. Nov 30, 2010 nptel provides courseware in the form of video lectures and web courses. Nptel provides elearning through online web and video courses various streams. How to download notes directly in pdf format from nptel quora. Fundamentals of welding 1 introduction the term joining is generally used for welding, brazing, soldering, and adhesive bonding, which form a permanent joint between the partsa joint that cannot easily be separated. Before any structural steel is fabricated or erected, a plan of action and sequence of events, or erection, needs to be set up. This video is part of the content developed by nptel. You can also get course completion certification for some of the courses. Some courses might have presentations or quiz papers uploaded, but rest of them just have transcripts which is pretty useless to refer as notes. Rating is available when the video has been rented. Smart material, adaptive structures and intelligent mechanical systems iitk. This technique was discovered during efforts to manipulate iron into useful shapes.
Mig welding is generally regarded as one of the easiest type of welding to learn. Welding codes and how theyre used almost all design, welding, fabrication, material, repair, testing, and inspection requirements are covered under three main governing organizations. Nov 02, 2016 in mechanical engineering welding is one of the most important metal joining process. As a result this process can produce quick and neat welds over a wide range of joints. Experience gained from user contact and welding training of crewmembers showed that. Gas welding is a most important type of welding process. Fundamental of welding science and technology intro video. The process uses shielding from an externally supplied.
They cannot be separated easily by application of forces. Sanok, aiaa 20003406, explosive joining for the mars sample return mission, 36 th aiaaasmesaeasee joint propulsion conference and exhibit, july 1719, 2000. Ahw atomic hydrogen welding caw constricted arc welding tig tungsten inertgas arc welding mig metal inertgas arc welding mag metal activegas arc welding pjw plasma jet welding paw plasma arc welding pjpw plasma jet plasma arc welding gmgmma gasmixture shielded metalarc welding magm magc co2shielded metalarc welding ngw narrowgap welding. Each of the above type of welding can be further classified depending on other micro level characteristics. A free powerpoint ppt presentation displayed as a flash slide show on id. Different types of welding and what they are used for. Explosive welding is a solid state metal joining process used to create a metallurgical bond between two similar or dissimilar metals 1. Majority of video courses on nptel do not offer lecture notes for download.
Structural welding is a process by which the parts that are to be connected are heated and fused, with supplementary molten metal at the joint. They are mainly used to assemble many parts to make a system. Welding, is a welding process that is now widely used for welding a variety of materials, ferrous and non ferrous. The melted part of welding plates diffused in one another and create a weld joint. The fuel gas commonly acetylene, when mixed with proper proportion of oxygen in a mixing chamber of welding torch, produces a very hot flame of about 57005800f. All fusion welding processes have three requirements. Nptel, online courses and certification, learn for free. Fundamentals of gas cutting and welding ced engineering.
The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. The welding is a process of joining two or more, similar or dissimilar metals by heating them to a suitable temperature, with or without the application of pressure, filler materials and flux. Welding and metal fabrication book pdf welding and metal fabrication is designed to help you develop all of the skills to become a highly paid versatile welder. Casting consists of pouring molten metal into a mold, where it solidifies into the shape of the mold. The plans, sequences, and required materials are predetermined by the engineering section and drawn up as a set of plans. The two pieces of metal to be joined are squeezed together by the electrodes on the welding machine so they are in good electrical contact. Chapter 3 introduction to welding in the navy as well as private industry, welding is widely used by metalworkers in the fabrication, maintenance, and repair of parts and structures. Damodar maity, department of civil engineering,iit guwahati. They produce permanent joint between the parts to be assembled.
Mig welding is the process of using electricity to melt and join pieces of metal together. A weld joint is produced by means of a high velocity impact of one metallic mass onto another, aided by a controlled detonation. As we know that in casting we some defects are always there and similarly in welding defects are there. Nptel, iit, lectures, courses, video, engineering, online. Subjected to axial and bending mod2 lec5 design of fillet and butt welds. Fundamental of welding science and technology video. Welding and metal fabrication book pdf boilersinfo. Welding metallurgy certificate program gain practical knowledge and experience in welding metallurgy. This opens up whole new areas in welding technology. The welding process involves applying heat and pressure to the materials being joined, in addition to a filler material, in order to create a weld pool which cools to form a strong joint.
Nptel provides courseware in the form of video lectures and web courses. If youre looking for a free download links of welding and metal fabrication pdf, epub, docx and torrent then this site is not for you. Lecture notes welding and joining processes materials. Fundamental of welding science and technology prof. Mechanical engineering online courses with video lectures. The process uses shielding from an externally supplied gas to protect the molten weld pool. In addition, it is designed to make the process of learning to weld interesting and rewarding by having everything you weld on becoming something you can take home and use. In applications such as semiconductor or pharmaceutical tube welding, orbital welding is the only means to achieve the required level of weld quality and consistency. Nptel syllabus welding engineering video course course outline welding is one most the most commonly used fabrication techniques. Welding, technique used for joining metallic parts usually through the application of heat. The process was well established in the bronze age beginning c. Nptel design of steel structures nptel video lectures from.
Advances in welding and joining technologies video. The process of carburization of iron to produce hard steel was known at this time, but the. Welding metallurgy certificate program asm international. It is done by burning of fuel gases with the help of oxygen which forms a concentrated flame of high temperature. Welding welding is a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or without the application of pressure or by the application of pressure alone, and with or without the use of filler material. Find materials for this course in the pages linked along the left. Mod2 lec4 welding lecture series on design of steel structures by dr.
Joining of materials joining includes welding, brazing, soldering, adhesive bonding of materials. Welding is a skill that needs to be developed over time, with a. Welding executive summary program description welding is an instructional program that prepares students for employment or continued education in the occupations of the welding field. Even the department of defensedod has either adopted many of these codes, or used them as a basis to develop their own codes known as milspecs. The curriculum framework for this program was developed in partnership with the mississippi construction education foundation mcef. Welded blades were developed in the 1st millennium ce, the most famous being those produced by arab armourers at damascus, syria. Resistance welding requires neither additional material or holes in the metal. Learn a variety of welding and joining processes and customize your certificate to match your interests and career path. Welding codes and how theyre used son set consultants. Feb 12, 2017 resistance welding and types of resistance welding understand easily duration. For getting a sound weld, the students are required to be aware of the science behind the welding phenomena, especially in the domain of weld metal solidification, heat transfer. Pankaj biswas dept of mechanical engineering iit guwahati.
684 1133 1569 739 350 339 1000 1128 1083 28 504 1193 1113 215 73 1415 1529 813 12 1356 416 663 443 1397 710 1274 469 606 821 166 592 912 951